device is opened by default).
Don't open the file w/o adding a /dev/ prefix unless the file has
a '/' in it.  This prevents problems where someone says "disklabel
sd0" with a file called "sd0" in the cwd.
The OPENDEV_DRCT flag has been deprecated as it is the the default
behavior and always has been.
Add checks for >= MAXPATHLEN and return ENAMETOOLONG in that case.

Since /tmp might be a link to /var/tmp, prune at ssh-* or .X11-unix
like the find on /tmp does.

everything fits...

o utmp lives in /var/run, not /etc
o document EX_CONFIG

errors specified by the library routine malloc(3)).

- s/MESSAGES/DIAGNOSTICS/, and put message descriptions in a nice list.
- Talk more about how using malloc() in signal handlers is bad.